Terminology explanation of valve structure and components

What is the each part name of valve?

As a manufacturer of butterfly valves, gate valves, check valves and other valves with 17 years of production experience and more than ten years of foreign trade experience, ZFA valves can be said to have some experience in the terminology of various types of valves. Today I have summarized some commonly used terms to share with you so that you can understand valves better and faster.

TERMexplanation
1Face to face dimensionThe straight-through type is the distance between the inlet and outlet end faces, and the angle type is the distance from the inlet (or outlet) end face to the outlet (or inlet) axis.
2Type of constructionThe main characteristics of various types of valves in terms of structure and geometry
3BodyThe main parts of the valve that are directly connected to pipelines (or machinery and equipment) and control the flow of media
4BonnetThe main part that is connected to the valve body and forms the pressure chamber with the valve body (or through other parts, such as diaphragms, etc.)
5DiscA general term for parts used to cut off or regulate the flow of media, such as gate plates in gate valves, valve discs in throttle valves, etc.
6Disc(plug)Opening and closing parts in globe valves, throttle valves, check valves and other valves
7Disc(butterfly plate)Opening and closing parts in butterfly valve
8Seat ringParts installed on the valve body and forming a sealing pair with the opening and closing parts
9Sealing faceThe opening and closing parts are in close contact with the valve seat (valve body) and serve as two contact surfaces for sealing.
10StemThe main parts that transmit the opening and closing force to the opening and closing parts
11Yoke bushingParts that form a kinematic pair with the valve stem thread
12Stuffing boxThe valve cover (or valve body) is filled with packing, a structure used to prevent the medium from leaking from the valve stem.
13Stuffing boxParts filled with packing to prevent medium from leaking from the valve stem
14GlandParts used to compress the packing to achieve sealing
15PackingFilling material placed in the stuffing box (or stuffing box) to prevent the medium from leaking from the valve stem
16Packing seatParts that support the packing and keep it sealed
17YokeOn the gland or valve body, the parts used to support the valve stem nut and transmission mechanism
18Through way typeValve body shape with inlet and outlet axes coincident or parallel to each other
19Angle typeValve body form with inlet and outlet axes perpendicular to each other
20Y-globe typeThe valve body shape is a valve body shape in which the passage is in a straight line and the valve stem position is at an acute angle with the axis of the valve body passage.
21Three way typeValve body form with three passage directions
22T-pattern three wayThe passage of the plug (or ball) is a “T” shaped three-way
23L-pattern three wayThe passage of the plug (or ball) is an “L” shaped three-way
24Balance typeStructural form that uses medium pressure balance to reduce the axial force of the valve stem
25Lever typeThe structural form of using lever to drive the opening and closing parts
26Normally open typeWhen there is no external force, the opening and closing parts are automatically in the open position.
27Normally closed typeWhen there is no external force, the opening and closing parts are automatically in the closed position.
28Steam jacket typeVarious valves with steam heating jacket structure
29Bellows seal typeVarious valves using bellows as the main seal of the valve stem
30Back seatA sealing structure that prevents medium from penetrating into the stuffing box when the valve is fully open.
31Pressure seatA mechanism that uses medium pressure to automatically seal the connection between the valve body and the valve cover.
32Dimension of valve stem headMechanical dimensions of the assembly and connection parts between the valve stem and the handwheel, handle or other operating mechanism
33Dimension of valve stem
End
Structural dimensions of the connection between the valve stem and the opening and closing parts
34Dimension of connecting channelMechanism dimensions of the assembly and connection parts of the opening and closing parts and the valve stem
35Impact hand wheelHandwheel structure that uses impact force to reduce valve operating force
36Type of connectionVarious methods used to connect valves to pipelines or machinery and equipment (such as flange connections, threaded connections, welded connections, etc.)
37Electric actuatorA driving device that uses electricity to open, close or adjust valves
38Pneumatic actuatorA driving device that uses air pressure to open, close or adjust valves
39Hydraulic actuatorA driving device that uses hydraulic pressure to open, close or adjust valves
40Electro magnetic actuatorA driving device that uses electromagnetic force to open and close valves
41Electro-hydraulic actuatorDriving device for opening and closing valves using electric and hydraulic pressure
42Electro magnetic-hydraulic actuatorA driving device that uses electromagnetic force and hydraulic force to open and close valves
43Pneumatic-hydraulic actuatorDriving device for opening and closing valves using pneumatic pressure and hydraulic pressure
44Worm gear actuatorA device that uses a worm gear mechanism to open, close or adjust a valve
45Cylindrical gear actuatorA device that uses a cylindrical gear mechanism to open, close or adjust valves
46Conical gear actuatorA device that uses a bevel gear mechanism to open, close or adjust valves
47Wedge discThe opening and closing parts in the gate valve include single gate, double gate, and elastic gate.
48Single gate discA rigid gate structure made in one piece
49Double gate discA gate structure composed of two gates
50Flexible gate discA gate structure that can produce elastic deformation
51BallOpening and closing parts in ball valve
52DiaphragmOpening and closing parts in diaphragm valve
53PlugOpening and closing parts in plug valve
54Hinge pinIn a swing check valve, the fixed axis around which the valve disc rotates
55ArmIn the swing check valve, the part that connects the disc and the pin and rotates around the pin
56Throat diameterDiameter of the minimum cross-section of the safety valve seat passage
57Adjusting boltSleeve-type parts in safety valves that adjust spring compression
58Spring plateParts that support springs in safety valves
59Valve guideThe part in the safety valve that guides the valve disc
60Disc holderThe part in the safety valve that is connected to the valve disc to change the flow direction of the medium and increase the opening height.
61Adjusting ringA part of a safety valve that is connected to the valve seat or guide sleeve to adjust the opening and closing pressure difference.
62Regulation springIn the pressure reducing valve, the spring used to adjust the outlet pressure
63Returnning springIn the pressure reducing valve, the spring is used to reset the opening and closing parts.
64DiaphragmThe part in the pressure reducing valve that plays the role of balancing the pressure before and after the valve.
65DiscOpening and closing parts in disc traps
66Inverted bucketThe bell-shaped part in the trap that drives the valve disc to move.
67Ball floatThe trap bell controls the opening and closing of a hollow sphere
68Bucket floatThe barrel-shaped part in the trap that drives the valve disc to move

 

It can be seen from the above that even the same parts have different names in different valves. such as valve plate, which is called butterfly plate in butterfly valves, gate in gate valves, and plug in plug valves, so we need to be flexible use.